An ad-hoc network is the cooperative engagement of a collection of mobile nodes without the required intervention of any centralized access point or existing infrastructure. In this paper we present Ad-hoc On Demand Distance Vector Routing (AODV), a novel algorithm for the operation of such ad-hoc networks. Each Mobile Host operates as a specialized router, and routes are obtained as needed (i.e., on-demand) with little or no reliance on periodic advertisements. Our new routing algorithm is quite suitable for a dynamic selfstarting network, as required by users wishing to utilize ad-hoc networks. AODV provides loop-free routes even while repairing broken links. Because the protocol does not require global periodic routing advertisements, the demand on the overall bandwidth available to the mobile nodes is substantially less than in those protocols that do necessitate such advertisements. Nevertheless we can still maintain most of the advantages of basic distance-vector routing mechanisms. We show that our algorithm scales to large populations of mobile nodes wishing to form ad-hoc networks. We also include an evaluation methodology and simulation results to verify the operation of our algorithm.

The availability of tremendous computation power coupled with widespread connectivity have fueled the development of real-time environmental observation and forecasting systems (EOFS).

In this paper we present a scalable routing protocol for ad hoc networks. The protocol is based on a geographic location management strategy that keeps the overhead of routing packets relatively small. Nodes are assigned home regions and all nodes within a home region know the approximate location of the registered nodes. As nodes travel, they send location update messages to their home regions and this information is used to route data packets. In this paper, we derive theoretical performance results for the protocol and prove that the control packet overhead scales linearly with node speed and as N 3/2 with increasing number of nodes. These results indicate that our protocol is well suited to relatively large ad hoc networks where nodes travel at high speed. Finally, we use simulations to validate our analytical model.

this paper will touch on current topics in many areas of networking. From cryptography to routing, from billing to expanded techniques for automatic configuration, mobility changes the way we think about computing, and invalidates some of the design assumptions upon which current network protocols and products have been built

A Mobile Ad hoc NETwork (MANET) is a group of mobile nodes that form a multi-hop wireless network. The topology of the network can change randomly due to unpredictable mobility of nodes and propagation characteristics. Previously, it was assumed that the nodes in the network were assigned IP addresses a priori. This may not be feasible as nodes can enter and leave the network dynamically. A dynamic IP address assignment protocol like DHCP requires centralized servers that may not be present in MANETs. Hence, we propose a distributed protocol for dynamic IP address assignment to nodes in MANETs. The proposed solution guarantees unique IP address assignment under a variety of network conditions including message losses, network partitioning and merging. Simulation results show that the protocol incurs low latency and communication overhead for an IP address assignment. MANET, address allocation, IP-networks. Index Terms

this paper we propose a new protocol for reliable multicast in a multihop

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In this paper, we propose an adaptive self- stabilizing algorithm for producing a d-hop connected d-hop dominating set. In the algorithm, the set is cumulatively built with communication requests between the nodes in the network. The set changes as the network topology changes. It contains redundancy nodes and can be used as a backbone of an ad hoc mobile network.

The main purpose of an ad hoc network routing protocol is to enable the transport of data packets from one point to another. This paper examines the potential attacks on this transport service which arise from the realisation of threats from internal malicious nodes. The prerequisite of a routing service is a distributed mechanism for the discovery and maintenance of routes; network integrity and availability are required to ensure the correct operation of an ad hoc network. This paper also provides a qualitative analysis of how proactive and reactive protocols cope with malicious internal attacks, and whether one type of protocol offers inherently better resistance to the various attacks than the other.

In mobile ad hoc networks, most of the present routing protocols are designed to have congestion aware, but not congestion adaptive. The way in which the congestion is handled results in longer delay and more packets to be lost for streaming multimedia. When a new route is needed, the routing protocols require a significant overhead in finding it. Mobile Ad hoc Networks shows unexpected behavior with multiple data streams under heavy traffic load such as multimedia data when it is sent to common destination. The main reason for more delay and packet loss in mobile ad hoc networks is due to congestion. The system adapts adaptive congestion control aware to existing routing protocols in mobile ad hoc networks. In this paper we propose an adaptive congestion control method, in which perform well even during constrained situation. We have considered four popular routing protocols such as AODV, DSR, DSDV and TORA to analyzing the performance of the system. The proposed congestion control routing protocol will perform well for all the other routing protocols during heavy traffic loads. We can suggest here that routing protocols should not have only be aware of but also be adaptive to network congestion. I